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2 years ago

3. (02.02 MC)

Mathematics

1 answer:

LenaWriter [7]2 years ago

8 0

Answer:

O -1+ 3/

Step-by-step explanation:

brainest plz

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What are the solutions of the quadratic equation? 4x^2+34x+60=0

insens350 [35]

Answer:

Option 3) -6,-5/2

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$4x^{2} +34x+60=0$

$a=4\\b=34\\c=60$

substitute in the formula

$x=\frac{-34(+/-)\sqrt{34^{2}-4(4)(60)}} {2(4)}$

$x=\frac{-34(+/-)\sqrt{196}} {8}$

$x=\frac{-34(+/-)14} {8}$

$x_1=\frac{-34(+)14} {8}=-\frac{20}{8}=-\frac{5}{2}$

$x_2=\frac{-34(-)14} {8}=-6$

6 0

2 years ago

-3x(x+8)+x+2(9-x-x^2) please show solving steps

Flauer [41]

Answer:

-5x^2 - 25x + 18

Step-by-step explanation:

-3x ( x + 8 ) + x + 2 ( 9 - x - x^2 ) ( original equation )

-3x^2 - 24x + x + 18 - 2x - 2x^2 ( distribute )

-3x^2 - 2x^2 - 24x + x - 2x + 18 ( order them based on the variables . )

( -3x^2 - 2x^2 ) (- 24x + x - 2x ) ( + 18 ) ( just separated them not a part of solving !! )

-5x^2 - 25x + 18 ( solved , and the answer :) )

Hope its helps !!!

4 0

2 years ago

<img src="https://tex.z-dn.net/?f=y%20%3D%20%284x3%20%2B%202x%291" id="TexFormula1" title="y = (4x3 + 2x)1" alt="y = (4x3 + 2x)1

Amanda [17]

I think it’s dy/dx=2

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3 years ago

Alma wants to prove to her parents that listening to music while she studies for her tests will help her get better grades. She

Nikolay [14]

She asked her friends, which does not represent a random sample.

She tried to show cause and effect without doing an experiment (which includes simple random sample, control group, treatment, etc).

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2 years ago

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Please help to solve the problem

Wittaler [7]

17 friends for the first one

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2 years ago